American Laura Cipullo, a nutritionist, says that drinking coffee immediately after waking up is not very useful. The body is still not really awake and can feel too powerful burst of energy that leads to headaches… and sleepiness. In addition, the morning the body’s maximum levels of the hormone cortisol, and caffeine can increase feelings of anxiety.
It is best to drink the first Cup, when cortisol becomes smaller: 3-4 hours after waking, between approximately 9 and 12 hours a day. Then you can continue, but remember that the stimulating effect of caffeine remains for up to six hours (peak — about an hour). So coffee at bedtime is not a good idea.
Completely abandon him, too, not worth it, because coffee has many health benefits. It helps to reduce the risk of heart attack and dementia, and prolong life. One comment: drink coffee in small quantities, preferably not more than 2-3 cups per day.